EP2985640B1 - Support de prévention de contrefaçon, son procédé de fabrication, et procédé de prévention de contrefaçon - Google Patents

Support de prévention de contrefaçon, son procédé de fabrication, et procédé de prévention de contrefaçon Download PDF

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Publication number
EP2985640B1
EP2985640B1 EP14782754.7A EP14782754A EP2985640B1 EP 2985640 B1 EP2985640 B1 EP 2985640B1 EP 14782754 A EP14782754 A EP 14782754A EP 2985640 B1 EP2985640 B1 EP 2985640B1
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EP
European Patent Office
Prior art keywords
image
identification data
transparent area
counterfeit medium
transparent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP14782754.7A
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German (de)
English (en)
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EP2985640A4 (fr
EP2985640A1 (fr
Inventor
Mihoko OHKAWA
Hideki Ochiai
Kota AONO
Yuki KOTEGAWA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toppan Inc
Original Assignee
Toppan Printing Co Ltd
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Publication date
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Publication of EP2985640A1 publication Critical patent/EP2985640A1/fr
Publication of EP2985640A4 publication Critical patent/EP2985640A4/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/364—Liquid crystals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/324—Reliefs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/391—Special inks absorbing or reflecting polarised light
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/003—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using security elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/416—Reflective
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/42—Polarizing, birefringent, filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2554/00—Paper of special types, e.g. banknotes

Definitions

  • the present invention relates to anti-counterfeit media which can be advantageously used for booklets such as passports and visas or information authentication media such as cards, and methods relating to the same.
  • Authentication articles such as cash cards, credit card and passports, and valuable securities such as gift certificates and stock certificates are desired to be difficult to counterfeit.
  • labels are attached on those articles to prevent their counterfeiting or imitation and to facilitate distinguishing them from counterfeit products or imitation products.
  • an anti-counterfeit medium which is a polarized latent image device having a retardation layer formed on a reflection layer has been proposed.
  • the anti-counterfeit medium shows an image with clearness continuously varying depending on an angle formed by the polarization axis of the polarized light film and a slow axis of the retardation layer.
  • the anti-counterfeit medium disclosed in PTL 1 divides each of the first identification data and the second identification data into a plurality of partial images, and provides a plurality of transparent areas which corresponds to the plurality of partial images which are disposed adjacent to each other in a same plane so as to form the retardation layer, the plurality of transparent areas having optical axes which are oriented in different directions from each other in a rotation direction.
  • a plurality of latent images which are recorded to be overlapped each other can be individually observed with high contrast ratio.
  • US 2007-0035833 A1 discloses an optical component containing two or more hidden images for authentication and anti-forgery purposes.
  • the optical component comprises an optical retarder in which the images are embedded in separate adjacent areas, each image being associated with a different mode of interaction with polarized light.
  • the optical component is manufactured by applying a layer of orientable linearly photo-polymerizable (LPP) material onto the top of a reflector provided on a transparent substrate and exposing the layer to polarized light of different polarization directions through a photo-mask, followed by coating with a cross-linkable liquid crystal polymer (LCP).
  • LPP linearly photo-polymerizable
  • EP 1 227 347 A1 discloses an optical security device comprising a liquid crystal polymer network having a patterned structure.
  • the device is manufactured by a method comprising: providing a substrate; jet printing an alignment layer in a pattern onto the substrate; exposing the alignment layer to polarized light; coating the substrate bearing the alignment layer with a layer comprising a cross-linkable liquid crystal material; allowing the liquid crystal material to align; and cross-linking the liquid crystal material.
  • WO 98/52077 discloses an optical component for preventing forgery, comprising a retarder and a polarizer, the retarder being placed on an orientation layer comprising a photo-oriented polymer network (PPN) which is in contact with the polarizer.
  • the retarder comprises an anisotropic layer of liquid-crystal polymers (LCP) and has a molecular alignment whose orientation is defined by the underlying orientation layer.
  • both the first and second identification data are geometric shapes, it is desirable to make it more difficult to counterfeit.
  • the present invention has been made to overcome the above problem, and an object of the invention is to make an anti-counterfeit medium which is a polarized latent image device more difficult to counterfeit.
  • a first aspect of the present invention is an anti-counterfeit medium as defined in claim 1.
  • Another aspect of the present invention is a method for manufacturing an anti-counterfeit medium as defined in claim 2.
  • Another aspect of the present invention is a method for preventing counterfeiting as defined in claim 3.
  • Fig. 15 to Fig. 22 relate to the invention as defined in claims 1 to 3.
  • Fig. 15 to Fig. 22 relate to the invention as defined in claims 1 to 3.
  • Fig. 1 shows a transfer foil 1 used in a method for manufacturing an anti-counterfeit medium according to the present invention.
  • the transfer foil 1 includes a retardation layer 2.
  • the retardation layer 2 has an optical axis which extends in a feeding direction indicated by the arrow in Fig. 1 .
  • the optical axis is oriented in the same direction across the entire retardation layer. The direction of optical axis may not necessarily be the feeding direction.
  • the transfer foil 1 is formed of a base material 5, the retardation layer 2, a reflection layer 3, and an adhesive layer 4, which are laminated in this order.
  • the retardation layer 2 may be made of a material having birefringence. Birefringence means that refractive indices of an object are different depending on the optical axis direction, and accordingly, light which travels through such an object has different speeds. As a result, retardation occurs due to the different travelling speeds in the light which has passed through the object.
  • the material may be a liquid crystal material.
  • Orienting the optical axis of the retardation layer 2 in one direction may be achieved by drawing a film or applying a rubbing process to a film.
  • drawing a film the optical axis is oriented in the drawing direction of the film.
  • a rubbing process of a film the optical axis is oriented in the rubbing direction.
  • a uniaxially oriented liquid crystal may be obtained by applying liquid crystal on an orientation film which is treated with orientation process in any unidirection.
  • the orientation process of orientation film for orienting a liquid crystal material may be performed by, for example, a rubbing orientation method or an optical orientation method.
  • a retardation value may be determined depending on the index of birefringence and the film thickness of liquid crystal.
  • the rubbing orientation method is a method of directly rubbing the base material by using a cloth or rubbing an orientation film formed by applying polymer solution on the base material by using a cloth. This method uses an alteration in property of the surface of the base material or the surface of the orientation film which occurs in the rubbing direction and liquid crystal molecules are aligned in the rubbing direction.
  • the orientation film may be made of polyimide, PVA or the like.
  • the optical orientation method is a method of irradiating light having anisotropy such as polarized light or irradiating non-polarized light in an oblique direction to the orientation film, thereby inducing re-alignment or anisotropic chemical reaction of molecules in the orientation film.
  • This method uses that liquid crystal molecules which are aligned by providing anisotropy to the orientation film.
  • Mechanisms of providing optical orientation may include using the anisotropy of azobenzene derivatives, photodimerization or cross-linkage of derivatives of cinnamic acid ester, coumarin, chalcone and benzophenone, and photodegradation of polyimide.
  • orientation film When the orientation film is used as described above, a known technique such as gravure coating method or micro gravure coating method may be used for the orientation film.
  • the retardation layer 2 may be obtained by providing a liquid crystal material on an oriented film, a film treated by a rubbing process, or an orientation film treated by an orientation process.
  • Liquid crystal materials may include photo-curable liquid crystal monomers having acrylate on both ends of the mesogenic group, EB or UV curable polymer liquid crystal, polymer liquid crystal having mesogenic groups for the polymer main chain, and liquid crystal polymer in which the molecular main chain itself is oriented. After those liquid crystals being applied, a heat treatment may be performed at a temperature slightly lower than the N-I point at which phase transition occurs so as to promote orientation.
  • Fig. 3 shows a manufacturing method of an anti-counterfeit medium.
  • the anti-counterfeit medium is formed by transferring a first image 7, which is one of two partial images that are obtained by dividing identification data into two parts, to a transferred object 6 by using the transfer foil 1.
  • a first transparent area 8 which is provided by transferring the first image 7 on the transferred object 6 and an optical axis 9 of the first transparent area 8 are disposed at an angle shown in Fig. 4 .
  • the transferred first transparent area 8 has an outline of the shape of a facial picture.
  • a second image 10 which is the other of two partial images that are obtained by dividing identification data into two parts, is transferred to the transferred object 6 at an angle shown in Fig. 5 .
  • a second transparent area 12 which is provided by transferring the second image 10 on the transferred object 6 has an outline of the rectangular screen with a portion corresponding to the facial picture being removed.
  • the first image 7 and the second image 10 can be transferred by using a thermal head 25 as shown in Fig. 23 .
  • the thermal head 25 heats the retardation layer 2, the reflection layer 3 and the adhesive layer 4 of the transfer foil 1 with the base material 5 interposed.
  • the adhesive layer 4 is melted by heat and pressure applied by the thermal head 25, and accordingly, only a portion of the retardation layer 2, the reflection layer 3 and the adhesive layer 4 of the transfer foil 1 which corresponds to an area heated by the thermal head 25 is thermally transferred to the transferred object 6 as shown in Fig. 24 .
  • the first transparent area 8 and the second transparent area 12 are disposed adjacent to each other in the same plane, thereby forming a single retardation layer 2 on the transferred object 6, which is provided as the anti-counterfeit medium.
  • the transferred first transparent area 8 and its optical axis 9, and the transferred second transparent area 12 and its optical axis 13 have a relationship as shown in Fig. 6 . That is, the optical axis 13 of the second transparent area 12 is inclined to the optical axis 9 of the first transparent area 8 by an angle of 45°.
  • the anti-counterfeit medium of Fig. 6 is observed via a verifier 15 which is held over the anti-counterfeit medium.
  • a verifier 15 As the verifier 15 is rotated by 45° from Fig. 7 to Fig. 8 , a visible latent image changes since the optical axes of the first transparent area 8 and the second transparent area 12 are shifted by 45°.
  • Figs. 9 to 11 shows that another identification data is transferred to the transferred object 6 by using the transfer foil 1 shown in Fig. 1 .
  • the inputted identification data is divided into three parts to form three partial images, that is, a first image 16 shown in Fig. 9 , a second image 17 shown in Fig. 10 , and a third image 18 shown in Fig. 11 .
  • the first image 16, the second image 17, and the third image 18 are transferred while the transferred object 6 is rotated by different rotation angles.
  • the first to third transparent areas are disposed adjacent to each other in the same plane, thereby forming a single retardation layer 2.
  • the anti-counterfeit medium having the identification data divided as shown in Figs. 9 to 11 and transferred is observed via a verifier 15 which is held over the anti-counterfeit medium.
  • the verifier 15 is rotated from Fig. 12 to Fig. 14 , the latent images 19a, 19b, 19c sequentially appear since the optical axes of the first, second, and third transparent areas are oriented in different directions.
  • Figs. 15 to 18 shows an embodiment according to the present invention using the transfer foil 1 shown in Fig. 1 .
  • the inputted two identification data are divided into two parts to form four partial images.
  • the first identification data is a facial picture as biometric information.
  • the second identification data is a character string as non-biometric information.
  • Four partial images are a first image 20 shown in Fig. 15 , a second image 21 shown in Fig. 16 , a third image 22 shown in Fig. 17 , and a fourth image 23 shown in Fig. 18 .
  • the first image 20 corresponds to a portion of the second identification data (that is, character string) which is not overlapped with the first identification data (that is, facial image).
  • the second image 21 corresponds to a portion in which neither the first identification data (that is, facial image) nor the second identification data (that is, character string) is recorded.
  • the third image 22 corresponds to a portion of the first identification data (that is, facial image) which is not overlapped with the second identification data (that is, character string).
  • the fourth image 23 corresponds to a portion in which the first identification data (that is, facial image) and the second identification data (that is, character string) are overlapped.
  • the first image 20, the second image 21, the third image 22, and the fourth image 23 are transferred while the transferred object 6 is rotated by different rotation angles.
  • the first to fourth transparent areas are disposed adjacent to each other in the same plane, thereby forming a single retardation layer 2.
  • the anti-counterfeit medium having the identification data divided as shown in Figs. 15 to 18 and transferred to the transferred object 6 is observed via a verifier 15 which is held over the anti-counterfeit medium.
  • the verifier 15 is rotated from Fig. 19 to Fig. 22 , the latent images 24a, 24b, 24c, 24d sequentially appear since the optical axes of the first, second, third, and fourth transparent areas are oriented in different directions.
  • a first rotation angle of the verifier 15 shown in Fig. 19 is the middle of the optical axis direction of the third image and the optical axis direction of the fourth image. Accordingly, in the latent image 24a which appears, the third image and the fourth image are displayed with equal tone so that only the image that corresponds to the first identification data, which is a synthesized image of the third image and the fourth image (that is, facial image), appears.
  • a second rotation angle of the verifier 15 shown in Fig. 20 is halfway between the optical axis direction of the first image and the optical axis direction of the fourth image. Accordingly, in the latent image 24b which appears, the first image and the fourth image are displayed with equal tone so that only the image that corresponds to the second identification data, which is a synthesized image of the first image and the fourth image (that is, character string), appears.
  • a third rotation angle of the verifier 15 shown in Fig. 21 is the middle of the optical axis direction of the first image and the optical axis direction of the second image. Accordingly, in the latent image 24c which appears, the first image and the second image are displayed with equal tone so that only the image that corresponds to the background of the first identification data, which is a synthesized image of the first image and the second image (that is, an image having the outline of rectangular screen with a portion corresponding to the facial picture being removed), appears.
  • a fourth rotation angle of the verifier 15 shown in Fig. 22 is the middle of the optical axis direction of the second image and the optical axis direction of the third image. Accordingly, in the latent image 24d which appears, the second image and the third image are displayed with equal tone so that only the image that corresponds to the background of the second identification data, which is a synthesized image of the second image and the third image (that is, an image having the outline of rectangular screen with a portion corresponding to the character string being removed), appears.
  • the retardation layer 2 of the transfer foil 1 is described as the retardation layer which is oriented in a uniaxial direction, a transfer foil which has a multi-axial retardation layer may be used. Alternatively, a plurality of transfer foils each of which have different optical axis directions with a retardation layer which is oriented in uni-axial direction may be provided and used as necessary. However, the retardation layer having the optical axis oriented in a uniaxial direction allows for reduction of manufacturing processes, and thus reduction of manufacturing cost.
  • the retardation value is preferably 1/4 ⁇ , for example, when a linear polarizer is used for the verifier 15 and the reflection layer 3 is incorporated into the transfer foil 1.
  • the retardation value 1/2 ⁇ is effective when a transparent substrate is used for the transferred object 6 and a linear polarizer is disposed on the back surface of the transferred object 6, and a linear polarizer is used for the verifier 15.
  • the retardation value 1/8 ⁇ is effective, for example, when a transparent substrate is used for the transferred object 6 and a circular polarizer is disposed on the back surface of the transferred object 6, and a circular polarizer is used for the verifier 15. In any of those cases, any of the retardation values 1/4 ⁇ , 1/2 ⁇ , 1/8 ⁇ may be used.
  • the base material 5 may be a non-oriented film formed by extruding or casting, an oriented film formed by drawing or the like.
  • the oriented film may be either a uniaxially oriented film or a biaxially oriented film.
  • Non-oriented film and oriented film may be made of a material such as cellophane, polycarbonate (PC), polyethylene (PE), polypropylene (PP), polyolefin (PO), ethylene vinyl alcohol (EVOH), polyvinyl alcohol (PVA), polyvinyl chloride, polyethylene naphthalate (PEN), polyethylene terephthalate (PET), nylon, acrylic resin, and triacetyl cellulose (TAC) film.
  • PC polycarbonate
  • PE polyethylene
  • PP polypropylene
  • PO polyolefin
  • EVOH ethylene vinyl alcohol
  • PVA polyvinyl alcohol
  • PEN polyethylene naphthalate
  • PET polyethylene terephthalate
  • nylon acrylic resin
  • acrylic resin and triacetyl cellulose
  • an orientation process for the above retardation layer 2 may not be necessary.
  • a rubbing process or orientation process of the orientation film needs to be performed.
  • the reflection layer 3 may be made of any metal material such as Al, Sn, Cr, Ni, Cu, Au, Ag or a compound thereof.
  • a transparent reflection layer 3 which is substantially transparent to light vertical to a film surface but has a reflective property to oblique light depending on the refractive index may be used as a single layer or multilayer.
  • the material of the transparent reflection layer 3 may include, but are not limited to, ceramics such as FE 2 O 3 , TiO 2 , CdS, CeO 2 , ZnS, PbCl 2 , CdO, WO 3 , SiO, Si 2 O 3 , In 2 O 3 , PbO, Ta 2 O 3 , ZnO, ZrO 2 , MgO, SiO 2 , MgF 2 , CeF 3 , CaF 2 , AlF 3 , Al 2 O 3 , GaO and organic polymers such as polyethylene, polypropylene, polytetrafluoroethylene, polymethyl methacrylate, polystyrene.
  • Methods for forming the reflection layer 3 may be a known method as appropriate, for example, a vacuum deposition method, sputtering method, and CVD method.
  • ink having a light reflection effect may be applied by a known printing method.
  • the reflection layer 3 may be formed along a relief forming layer.
  • a method for forming the reflection layer 3 along a relief structure may include providing a relief forming layer in advance, duplicating a fine concave-convex pattern by applying heat and pressure by using a relief type press plate formed of a fine concave-convex pattern of a relief hologram or a grating which uses light interference, and then forming the reflection layer 3 by using a known method such as a vacuum deposition method.
  • the relief forming layer may be disposed between the retardation layer 2 and the reflection layer 3.
  • the relief forming layer is preferably made of a material having a good thermoformability, resistance to uneven pressing, and formability of clear reproduction image.
  • thermo-plastic resin such as acryl-based resin, epoxy-based resin, cellulose-based resin and vinyl-based resin
  • thermosetting resin such as urethane resin containing acryl polyol, polyester polyol or the like having a reactive hydroxyl group with polyisocyanate added and cross-linked as a cross-linking agent
  • melamine-based resin and phenol-based resin melamine-based resin and phenol-based resin
  • UV or EB curable resin such as epoxy (meta)acryl, and urethane (meta)acrylate may be used alone or in combination thereof.
  • any resin other than described above may be used as appropriate as long as it may form a diffractive structure pattern.
  • the adhesive layer 4 is made of a heat-sensitive adhesive which exhibits adhesiveness when heat is applied.
  • the adhesive layer 4 is formed by providing a resin having such ability on the substrate by using gravure coater, microgravure coater, roll coater or the like.
  • Materials which may be used are thermoplastic resin such as acrylic resin, vinyl chloride-vinyl acetate copolymer, epoxy, and EVA.
  • a release layer may be disposed between the base material 5 and the retardation layer 2.
  • the release layer may be a resin alone, or a resin with lubricating agent being added.
  • resin may include thermoplastic resin, thermosetting resin, moisture curable resin, UV curable resin, and EB curable resin.
  • acrylic resin, polyester resin, or polyamide-imide resin may be used.
  • lubricating agent may include wax such as polyethylene powder or carnauba wax. Those may be used for the release layer formed on the base material 5 by using a known method such as gravure printing method or microgravure method.
  • the transferred object 6 may be transparent or opaque.
  • Materials for the transferred object 6 may include, for example, paper, plastic, metal, ceramics, and glass.
  • the inputted identification data may be divided into N parts as the first to Nth images.
  • the anti-counterfeit medium having the first transparent area, the second transparent area and the third transparent area, each of which have the optical axes shifted by an angle of 30° can be formed.
  • the latent image has different tones which are visible in the first transparent area, the second transparent area and the third transparent area, and the latent image 19a becomes visible as shown in Fig. 12 .
  • the tone in each retardation layer changes with the rotation of the verifier 15, the latent images 19b and 19c can be observed as shown in Fig. 13 and Fig. 14 , respectively. Since the tone changes from the first transparent area, the second transparent area to the third transparent area with the rotation of the verifier 15, the latent image with a motion of gradually changing tones can be observed.
  • the resultant first, second, third and fourth transparent areas have the optical axes which are shifted by an angle of 22.5° from each other.
  • the inputted data may be an image including personal information.
  • the personal information includes personal authentication information which is used for personal authentication.
  • the personal information may be classified as, for example, biometric information and non-biometric information.
  • the biometric information is information regarding biological characteristics and derived from an image or a pattern in a plane which is specific to the individual.
  • biometric information is at least one image or pattern of face, fingerprint, iris, vein and the like.
  • non-biometric information is personal information other than biometric information, which is particularly a character string or symbol string.
  • non-biometric information may be at least one of name, date of birth, age, blood type, gender, nationality, address, permanent address, phone number, department and title.
  • Non-biometric information may include typed characters, handwritten characters such as signature read by machine, or both of them.
  • the identification data including biometric information is divided into a plurality of partial images, and the plurality of partial images are provided as a plurality of transparent areas having different optical axis directions. Accordingly, the anti-counterfeit medium which is a polarized latent image device can be more difficult to counterfeit.
  • Lumirror 19F60 was provided as the base material 5, and the surface of the base material was rubbed by a rubbing cloth in the feeding direction of the raw sheet.
  • the UV curable liquid crystal UCL-008 manufactured by DIC corporation was applied by microgravure coating to form a thickness of retardation value of ⁇ /4, and UV-cured in oxygen atmosphere. As a result, the retardation layer having the optical axis in the feeding direction was obtained.
  • the reflection layer 5 made of aluminum was formed on the retardation layer.
  • the reflection layer 5 was formed by a vacuum deposition method to have a thickness of 500 ⁇ .
  • acrylic resin as the adhesive layer 4 was applied on the entire surface by microgravure coating, and the transfer foil 1 was obtained.
  • the first image 7 was transferred as shown in Fig. 3 by using the transfer foil 1 fabricated as above and the thermal head 25.
  • the second image 10 is transferred to a card as the transferred object 6, which was rotated to change the angle as shown in Fig. 5 , and the anti-counterfeit medium was obtained.
  • the anti-counterfeit medium was observed by using the verifier 15.
  • two latent images 14a, 14b as shown in Fig. 7 and Fig. 8 were observed via the verifier 15 which was held over the anti-counterfeit medium. Since the inputted data was binarized, divided into two parts, the first image 7 and the second image 10, and was transferred by using the thermal head 25, the latent images having a high degree of freedom such as a person's face, identification number and the like were formed.
  • Lumirror 19F60 was provided as the base material 5, and the surface of the base material was rubbed by a rubbing cloth in the feeding direction of the raw sheet.
  • the UV curable liquid crystal UCL-008 manufactured by DIC corporation was applied by microgravure coating to form a thickness of retardation value of ⁇ /2, and UV-cured in oxygen atmosphere. As a result, the retardation layer having the optical axis in the feeding direction was obtained. Then, acrylic resin as the adhesive layer 4 was applied on the entire surface of the retardation layer by microgravure coating, and the transfer foil 1 was obtained.
  • the inputted identification data was divided into three parts to form the first image 16 to the third image 18 as shown in Figs. 9 to 11 , each of which were transferred as the first transparent area to the third transparent area while changing the angle of the verifier 15, and the anti-counterfeit medium was obtained.
  • Triacetylcellulose (TAC) film was used for the transferred object 6.
  • a linear polarizer was disposed on the back surface of the anti-counterfeit medium, and the anti-counterfeit medium was observed by using the verifier 15.
  • the latent images 19a, 19b, 19c as shown in Figs. 12 to 14 were observed via the verifier 15 which was held and rotated over the anti-counterfeit medium.
  • Lumirror 19F60 was provided as the base material 5, and the surface of the base material was rubbed by a rubbing cloth in the feeding direction of the raw sheet.
  • the UV curable liquid crystal UCL-008 manufactured by DIC corporation was applied by microgravure coating to form a thickness of retardation value of ⁇ /4, and UV-cured in oxygen atmosphere. As a result, the retardation layer having the optical axis in the feeding direction was obtained.
  • the reflection layer 3 made of aluminum was formed on the retardation layer 2.
  • the reflection layer 3 was formed by a vacuum deposition method to have a thickness of 500 ⁇ .
  • acrylic resin as the adhesive layer 4 was applied on the entire surface by microgravure coating, and the transfer foil 1 was obtained.
  • the anti-counterfeit medium was observed by using the verifier 15.
  • the verifier 15 was held and rotated to a specific angle as shown in Figs. 19 to 22 , four images of the "person" positive image 24a, the "TP1234" positive image 24b, the "person” negative image 24c, and the "TP1234" negative image 24d were observed. Those images were not visually observed.
  • a transfer foil and anti-counterfeit medium capable of easily forming of identification information while achieving easy judgment of identification information and prevention of counterfeiting and falsification of identification information
  • the anti-counterfeit medium according to the present invention can be applied to various cards such as credit cards, cash cards, member cards, employee cards, prepaid cards and driver's licenses, various paper certificates such as gift certificates, gift coupons and stock certificates, application forms, receipts, various slips such as carbon copy slips, various booklets such as passports, passbooks and pension books, as well as covers of books and notebooks and displays such as panels.
  • the retardation layer may be bonded to a part of or the entire surface of the transferred object.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Credit Cards Or The Like (AREA)
  • Polarising Elements (AREA)
  • Laminated Bodies (AREA)
  • Printing Methods (AREA)

Claims (3)

  1. Support de prévention de contrefaçon dans lequel des données d'identification sont enregistrées, comprenant :
    une couche de retard (2) ayant une biréfringence ; et
    une couche de réflexion (3),
    les données d'identification sont divisées en une pluralité d'images partielles, et une pluralité de zones transparentes qui correspondent à la pluralité d'images partielles sont disposées adjacentes l'une à l'autre dans un même plan de façon à former la couche de retard, la pluralité de zones transparentes ayant des axes optiques qui sont orientés dans différentes directions l'une de l'autre dans un sens de rotation, et
    les données d'identification incluent des informations biométriques, dans lequel
    les premières données d'identification qui sont des informations biométriques et les deuxièmes données d'identification qui sont des informations non biométriques sont enregistrées dans la couche de retard (2) ; et
    le support de prévention de contrefaçon est configuré pour être capable d'afficher individuellement les première et deuxième donnés d'identification, dans lequel
    une partie des premières données d'identification et une partie des deuxièmes données d'identification sont enregistrées dans au moins une zone transparente de la pluralité de zones transparentes,
    caractérisé en ce que :
    la couche de retard inclut des première, deuxième et troisième zones transparentes ayant des axes optiques orientés dans différentes directions l'une de l'autre, les axes optiques étant orientés dans cet ordre dans le sens de rotation, dans lequel une quatrième zone transparente est prévue en outre adjacente à la première zone transparente et opposée à la deuxième zone transparente par rapport à la première zone transparente dans le sens de rotation de l'axe optique ;
    une première image (20) qui correspond à une portion des deuxièmes données d'identification qui ne sont pas recouvertes avec les premières données d'identification est enregistrée dans la première zone transparente ;
    une deuxième image (21) qui correspond à une portion qui ne contient pas les premières données d'identification et les deuxièmes données d'identification est enregistrée dans la deuxième zone transparente ;
    une troisième image (22) qui correspond à une portion des premières données d'identification qui ne sont pas recouvertes avec les deuxièmes données d'identification est enregistrée dans la troisième zone transparente ; et
    une quatrième image (23) qui correspond à une portion dans laquelle les premières données d'identification et les deuxièmes données d'identification sont recouvertes est enregistrée dans la quatrième zone transparente.
  2. Procédé de fabrication d'un support de prévention de contrefaçon, comprenant les étapes de :
    fourniture d'une couche de réflexion (3) ;
    division des données d'identification à enregistrer en une pluralité d'images partielles selon la revendication 1, les données d'identification incluent des informations biométriques ; et
    fourniture d'une pluralité de zones transparentes selon la revendication 1 qui correspondent à la pluralité d'images partielles à disposer adjacentes l'une à l'autre dans un même plan de façon à former une couche de retard (2), la pluralité de zones transparentes ayant une biréfringence et ayant des axes optiques qui sont orientés dans différentes directions l'une de l'autre dans un sens de rotation,
    dans lequel le support de prévention de contrefaçon est formé par transfert de la pluralité d'images partielles selon la revendication 1 à un objet (6) en utilisant un film de transfert (1).
  3. Procédé de prévention de contrefaçon, caractérisé en ce que le procédé comprend les étapes de :
    fourniture du support de prévention de contrefaçon selon la revendication 1 ; et
    observation du support de prévention de contrefaçon via une plaque de polarisation (15).
EP14782754.7A 2013-04-08 2014-04-07 Support de prévention de contrefaçon, son procédé de fabrication, et procédé de prévention de contrefaçon Active EP2985640B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013080469 2013-04-08
PCT/JP2014/001999 WO2014167834A1 (fr) 2013-04-08 2014-04-07 Support de prévention de contrefaçon, son procédé de fabrication, et procédé de prévention de contrefaçon

Publications (3)

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EP2985640A1 EP2985640A1 (fr) 2016-02-17
EP2985640A4 EP2985640A4 (fr) 2016-12-21
EP2985640B1 true EP2985640B1 (fr) 2019-07-10

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Country Link
US (2) US9956805B2 (fr)
EP (1) EP2985640B1 (fr)
JP (1) JPWO2014167834A1 (fr)
KR (1) KR102179883B1 (fr)
CN (1) CN105074515B (fr)
WO (1) WO2014167834A1 (fr)

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JP6318677B2 (ja) * 2014-02-17 2018-05-09 凸版印刷株式会社 配向膜の製造方法、および、表示体の製造方法
CN104851361A (zh) * 2015-02-13 2015-08-19 厦门天马微电子有限公司 一种防伪标签及其制造方法
WO2017060544A1 (fr) * 2015-10-08 2017-04-13 Universidad Politecnica De Madrid Élément optique et procédé de fabrication avec plusieurs images latentes pour la sécurité des documents
DE102017005192A1 (de) * 2017-05-31 2018-12-06 Giesecke+Devrient Currency Technology Gmbh Sicherheitselement mit zwei Kippeffekten
US11102372B2 (en) * 2017-09-15 2021-08-24 Dai Nippon Printing Co., Ltd. Information recording body, medium and printed product
CN112258975B (zh) * 2020-09-30 2023-03-31 北京石榴果科技有限公司 一种透明介质的防伪信息加工、读取、检测方法及装置

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Publication number Priority date Publication date Assignee Title
IT1277732B1 (it) * 1995-12-27 1997-11-12 Walter Mantegazza Documento con mezzi di antifalsificazione ed anticontraffazione particolarmente per cartevalori e simili
DE69824173T2 (de) 1997-05-09 2005-06-23 Rolic Ag Optisches bauelement
GB9825023D0 (en) * 1998-11-13 1999-01-06 Rolic Ag Optical component
US20040120040A1 (en) * 1998-11-13 2004-06-24 Rolic Ag Optical component
EP1227347A1 (fr) * 2001-01-29 2002-07-31 Rolic AG Dispositif optique et son procédé de fabrication
US20070081144A1 (en) * 2003-12-26 2007-04-12 Nhk Spring Co., Ltd. Discrimination medium and discrimination method for discriminating the same
DE102004039355A1 (de) * 2004-08-12 2006-02-23 Giesecke & Devrient Gmbh Sicherheitselement und Verfahren zu seiner Herstellung
JP5369479B2 (ja) 2008-04-11 2013-12-18 凸版印刷株式会社 表示体、粘着ラベル及び転写箔
CA2656506A1 (fr) * 2009-02-27 2010-08-27 Bank Of Canada Dispositif de verification des caracteristiques de securite
JP2011194837A (ja) * 2010-03-23 2011-10-06 Toppan Printing Co Ltd 画像表示体及びラベル付き物品
CN104090319B (zh) 2009-08-13 2017-06-20 凸版印刷株式会社 图像显示体及带标签的物品
JP5440149B2 (ja) * 2009-12-18 2014-03-12 凸版印刷株式会社 画像表示体、ブランク媒体及び個人認証媒体
JP5882566B2 (ja) * 2010-07-09 2016-03-09 富士フイルム株式会社 印刷および複屈折パターンを有する偽造防止媒体
JP5929013B2 (ja) * 2011-05-25 2016-06-01 凸版印刷株式会社 着色偽造防止構造体および着色偽造防止媒体
JP5697634B2 (ja) * 2011-07-26 2015-04-08 富士フイルム株式会社 光学フィルム、セキュリティ製品、および真贋判定方法

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US9956805B2 (en) 2018-05-01
US10300731B2 (en) 2019-05-28
CN105074515A (zh) 2015-11-18
US20160052327A1 (en) 2016-02-25
JPWO2014167834A1 (ja) 2017-02-16
KR20150139876A (ko) 2015-12-14
KR102179883B1 (ko) 2020-11-17
US20180222242A1 (en) 2018-08-09
EP2985640A4 (fr) 2016-12-21
WO2014167834A1 (fr) 2014-10-16
EP2985640A1 (fr) 2016-02-17
CN105074515B (zh) 2018-06-05

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